Fix broken logic for unemployed/self-employed mothers.

[KludgeKML]

To fix problems like: https://www.gov.uk/maternity-paternity-pay-leave/y/yes/2022-11-20/unemployed/worker/yes/yes/yes/yes/yes crashing the page.

https://trello.com/c/sNwVoHEl/1424-fix-crashes-in-maternity-or-paternity-leave-or-pay-smart-answer

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